Add pptify-slides-creation plugin for editable PowerPoint slides

[kimtth]

Pull Request Checklist

• I have read and followed the CONTRIBUTING.md guidelines.
• I have read and followed the Guidance for submissions involving paid services.
• My contribution adds a new instruction, prompt, agent, skill, or workflow file in the correct directory.
• The file follows the required naming convention.
• The content is clearly structured and follows the example format.
• I have tested my instructions, prompt, agent, skill, or workflow with GitHub Copilot.
• I have run npm start and verified that README.md is up to date.
• I am targeting the staged branch for this pull request.

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Description

Adds the pptify-slides-creation plugin for generating production-ready, editable PowerPoint (PPTX) decks with GitHub Copilot — from narrative strategy to coordinate-explicit slide specifications and audit-driven quality gates.

Agent

• pptify-slides-builder — guides the end-to-end deck workflow, from narrative strategy to coordinate-explicit JSON specifications and build scripts.

Skills

• pptify-context-prep — pick a business/storytelling framework, convert and summarize source material, analyze reference PPTX decks, and load bundled design profiles before authoring a spec.
• pptify-slide-spec — author or repair coordinate-explicit JSON deck specs (layout-tree groups, objects, bounding boxes, tables, images, lines, shapes, and a collision-safe type scale).
• pptify-visual-assets — plan and place icons, images, SVGs, and infographics with placement and decision guidance.
• pptify-tooling — import-only PPTX extraction and style-analysis helpers for reference-deck analysis and package inspection.
• pptify-quality-gates — validate and repair deck specs and PPTX packages against an 11-dimension audit checklist (collisions, overflows, hierarchy, asset layering, reference alignment).

The plugin is standalone: it provides guidance, design context, and import-only analysis APIs — there is no install step and no bundled setup/runtime scripts.

Validation completed locally:

npm run plugin:validate
npm run build

Both commands completed successfully, and pptify was validated as a plugin.

---

Type of Contribution

• New instruction file.
• New prompt file.
• New agent file.
• New plugin.
• New skill file.
• New agentic workflow.
• Update to existing instruction, prompt, agent, plugin, skill, or workflow.
• Other (please specify):

---

Additional Notes

Preview (50 layouts)

• Office viewer - pptx

Preview (81 layouts)

• Office viewer - pptx

---

By submitting this pull request, I confirm that my contribution abides by the Code of Conduct (../CODE_OF_CONDUCT.md) and will be licensed under the MIT License.

[github-actions]

🟡 Contributor Reputation Check: MEDIUM risk

Check	Risk
Profile	MEDIUM
Credential audit	NONE

Maintainers: please review this contributor before merging.
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[github-actions]

🔒 PR Risk Scan Results

Scanned 18 changed file(s).

Severity	Count
🔴 High	0
🟠 Medium	6
ℹ️ Info	2

Severity	Rule	File	Line	Match
🟠	package-exec-command	docs/README.skills.md	31	| [acreadiness-assess](../skills/acreadiness-assess/SKILL.md)<br />`gh skills install github/awesome-copilot acreadiness-assess` | Run the AgentRC readiness assessment on the curre
ℹ️	skill-script-touched	skills/pptify-tooling/references/pptx_extractor.py	1	skills/pptify-tooling/references/pptx_extractor.py
ℹ️	skill-script-touched	skills/pptify-tooling/references/pptx_style_master.py	1	skills/pptify-tooling/references/pptx_style_master.py
🟠	unpinned-version-indicator	skills/pptify-tooling/references/pptx_style_master.py	406	horizontal = "left" if center_x < 0.34 else "right" if center_x > 0.66 else "center"
🟠	unpinned-version-indicator	skills/pptify-tooling/references/pptx_style_master.py	407	vertical = "top" if center_y < 0.34 else "bottom" if center_y > 0.66 else "middle"
🟠	unpinned-version-indicator	skills/pptify-tooling/references/pptx_style_master.py	418	if len(boxes) >= 4 and spread_x > 0.32 and spread_y > 0.32:
🟠	unpinned-version-indicator	skills/pptify-tooling/references/pptx_style_master.py	420	if spread_x > 0.42 and spread_y > 0.42:
🟠	unpinned-version-indicator	skills/pptify-tooling/references/pptx_style_master.py	422	if len(boxes) >= 3 and spread_x > 0.42:

This is an automated soft-gate report. Findings indicate review targets and do not block merge by themselves.

[github-actions]

🔍 Skill Validator Results

⚠️ Warnings or advisories found

Scope	Checked
Skills	5
Agents	1
Total	6

Severity	Count
❌ Errors	0
⚠️ Warnings	3
ℹ️ Advisories	0

Summary

Level	Finding
ℹ️	Found 5 skill(s)
ℹ️	[pptify-context-prep] 📊 pptify-context-prep: 2,300 BPE tokens [chars/4: 2,830] (detailed ✓), 11 sections, 0 code blocks
ℹ️	[pptify-context-prep] ⚠ No code blocks — agents perform better with concrete snippets and commands.
ℹ️	[pptify-quality-gates] 📊 pptify-quality-gates: 1,175 BPE tokens [chars/4: 1,391] (detailed ✓), 6 sections, 1 code blocks
ℹ️	[pptify-slide-spec] 📊 pptify-slide-spec: 2,592 BPE tokens [chars/4: 2,641] (standard ~), 12 sections, 1 code blocks
ℹ️	[pptify-slide-spec] ⚠ Skill is 2,592 BPE tokens (chars/4 estimate: 2,641) — approaching "comprehensive" range where gains diminish.
ℹ️	[pptify-tooling] 📊 pptify-tooling: 1,018 BPE tokens [chars/4: 1,184] (detailed ✓), 8 sections, 1 code blocks
ℹ️	[pptify-visual-assets] 📊 pptify-visual-assets: 1,966 BPE tokens [chars/4: 2,280] (detailed ✓), 7 sections, 0 code blocks
ℹ️	[pptify-visual-assets] ⚠ No code blocks — agents perform better with concrete snippets and commands.
ℹ️	Found 1 agent(s)

Full validator output

Found 5 skill(s)
[pptify-context-prep] 📊 pptify-context-prep: 2,300 BPE tokens [chars/4: 2,830] (detailed ✓), 11 sections, 0 code blocks
[pptify-context-prep]    ⚠  No code blocks — agents perform better with concrete snippets and commands.
[pptify-quality-gates] 📊 pptify-quality-gates: 1,175 BPE tokens [chars/4: 1,391] (detailed ✓), 6 sections, 1 code blocks
[pptify-slide-spec] 📊 pptify-slide-spec: 2,592 BPE tokens [chars/4: 2,641] (standard ~), 12 sections, 1 code blocks
[pptify-slide-spec]    ⚠  Skill is 2,592 BPE tokens (chars/4 estimate: 2,641) — approaching "comprehensive" range where gains diminish.
[pptify-tooling] 📊 pptify-tooling: 1,018 BPE tokens [chars/4: 1,184] (detailed ✓), 8 sections, 1 code blocks
[pptify-visual-assets] 📊 pptify-visual-assets: 1,966 BPE tokens [chars/4: 2,280] (detailed ✓), 7 sections, 0 code blocks
[pptify-visual-assets]    ⚠  No code blocks — agents perform better with concrete snippets and commands.
Found 1 agent(s)
Validated 1 agent(s)
✅ All checks passed (5 skill(s), 1 agent(s))

[github-actions]

🟡 Contributor Reputation Check: MEDIUM risk

Check	Risk
Profile	MEDIUM
Credential audit	NONE

Maintainers: please review this contributor before merging.
See the workflow run for full details.
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[github-actions]

🟡 Contributor Reputation Check: MEDIUM risk

Check	Risk
Profile	MEDIUM
Credential audit	NONE

Maintainers: please review this contributor before merging.
See the workflow run for full details.
Automated check powered by AGT.

[github-actions]

🟡 Contributor Reputation Check: MEDIUM risk

Check	Risk
Profile	MEDIUM
Credential audit	NONE

Maintainers: please review this contributor before merging.
See the workflow run for full details.
Automated check powered by AGT.

[github-actions]

🟡 Contributor Reputation Check: MEDIUM risk

Check	Risk
Profile	MEDIUM
Credential audit	NONE

Maintainers: please review this contributor before merging.
See the workflow run for full details.
Automated check powered by AGT.

[github-actions]

🟡 Contributor Reputation Check: MEDIUM risk

Check	Risk
Profile	MEDIUM
Credential audit	NONE

Maintainers: please review this contributor before merging.
See the workflow run for full details.
Automated check powered by AGT.

[github-actions]

🟡 Contributor Reputation Check: MEDIUM risk

Check	Risk
Profile	MEDIUM
Credential audit	NONE

Maintainers: please review this contributor before merging.
See the workflow run for full details.
Automated check powered by AGT.